Fixing the Java Memory Model, Part 2
Submitted By:
idean
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Description
JSR 133, which has been active for nearly three years, has
recently issued its public recommendation on what to do about
the Java Memory Model (JMM). In part 1 of this series, the
author focused on some of the serious flaws that were found in
the original JMM, which resulted in some surprisingly difficult
semantics for concepts that were supposed to be simple. This
month, he reveals how the semantics of volatile and final will
change under the new JMM, changes that will bring their
semantics in line with most developers' intuition. Some of
these changes are already present in JDK 1.4; others will have
to wait until JDK 1.5.
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